In the reality it's not an engine lol. I guess...
Just npm start from the root of the project.
Stores in "script" folder. Better to split text to chapters.
Stores in "backgrounds" folder.
Stores in "sprites" folder.
# for characters' names.
some text
#charName
char's line
##
some text that not a char's line
~ for sprites.
some text
~name_of_needed_sprite.png